To provide a thermally changeable color writing tool used for writing letters whose color can be thermally changed by friction, quickly brought into a writing-capable state (pen-point projecting state) or a stored state (pen-point retracted state) even if the user can use only one hand, and containing a thermally changeable color ink.
The thermally changeable color wiring tool containing a thermally changeable color ink, comprises: a writing body 8 that accommodates the thermally changeable color ink inside; a barrel 2 that accommodates movably in an anteroposterior direction the writing body 8 inside; an elastic body 7 that energizes the barrel 2 rearward of the writing body 8; an operating part 5 that projects/retracts the pen point 81 of the writing body 8 from/into the front end hole 31 of the barrel 2; and a friction part 4 that can thermally change the color of the writing by the frictional heat generated when the writing is rubbed. The friction part 4 comprises the elastic material of low friction property which generates friction chips less than eraser when the writing is rubbed. The friction part 4 is provided at a front end part of the barrel 2 and the operating part 5 is provided at a part other than the front end part of the barrel 2.
SEKINE NOBUO
ANDO MASASHI
| JP2006063238A | 2006-03-09 | |||
| JP2004148744A | 2004-05-27 | |||
| JP2007015277A | 2007-01-25 |
| WO2008105227A1 | 2008-09-04 |
Hajime Tsukuni
Yasuo Yanagibashi
Satoko Ito
Keiko Ozawa
Yoshinori Ikukawa
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